MgB2 under pressure: critical temperature and electrical anisotropy loss
The effect of pressure on the MgB2superconductor was studied with electronic structure calculations. For each volume, the MgB2crystalstructure was optimized for thec=aratio. Band structure analyses reveal that the main effect of pressure is to reduceæ-band anisotropy andto change the number ofæ-carr...
| Authors: | , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2007 |
| Country: | México |
| Institution: | Universidad Nacional Autónoma de México |
| Repository: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57036163020 |
| Online Access: | https://www.redalyc.org/articulo.oa?id=57036163020 |
| Access Level: | Open access |
| Keyword: | Física, Astronomía y Matemáticas MgB2 superconductivity electrical anisotropy |
| Summary: | The effect of pressure on the MgB2superconductor was studied with electronic structure calculations. For each volume, the MgB2crystalstructure was optimized for thec=aratio. Band structure analyses reveal that the main effect of pressure is to reduceæ-band anisotropy andto change the number ofæ-carriers. These two physical properties can be associated to the critical temperature drop in MgB2. In terms of theæ-band anisotropy and the number ofæ-carriers, the pressure effect is also compared to that resulting from MgB2doped with C, Al and Sc. |
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